What is a common cause of tooth fractures?

Extensive caries, or tooth decay, is a common cause of tooth fractures because it significantly weakens the structure of the tooth. When dental caries progresses, it can create cavities that compromise the tooth's integrity. As the decay advances, it leads to the loss of mineral content and general tooth material, which increases the risk of breaking or cracking, especially under pressure from biting or chewing. Additionally, if the decay is left untreated, it can reach deeper layers of the tooth, causing further structural weakening and making it more susceptible to fractures.

Other choices, while they can have various impacts on dental health, are not typically recognized as leading causes of tooth fractures in the same direct and significant manner that extensive caries does. For instance, overcrowding may lead to misalignment but does not directly weaken dental structure like caries. Teeth whitening can lead to sensitivity or changes in appearance but is not involved in structural compromise. Exposure to cold temperatures might trigger sensitivity but does not structurally weaken teeth.